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bug#10470: MSYS: race in directory access?
From: |
Stefano Lattarini |
Subject: |
bug#10470: MSYS: race in directory access? |
Date: |
Tue, 10 Jan 2012 13:44:25 +0100 |
On 01/10/2012 12:35 PM, Peter Rosin wrote:
> Peter Rosin skrev 2012-01-10 11:12:
>> Stefano Lattarini skrev 2012-01-10 10:50:
>>> [2] Now that I think of it, my knee-jerk guess is that the "( sleep 1 ) &"
>>> put in configure by AM_SANITY_CHECK is the likely culprit.
>>
>> I tried that hypothesis and bumped this to "( sleep 2 ) &", and the test
>> case failed even with my ugly "sleep 1" workaround. I then bumped "my" fix
>> to "sleep 2" and the test case succeeded again. So they certainly seem
>> connected.
>
> One further data point; changing that "( sleep 1 ) &" thing followed by a
> wait just before AC_OUTPUT into an inlined sleep also fixes the test case.
>
Thanks for tracking this down. So the question now becomes: why doesn't
the trick with background processes work on MSYS? Does maybe MSYS lack
proper emulation of POSIX-ish PIDs? If that is the case, can we easily
work around that in our situation?
> As below, but as before, one unconditional second might be too expensive.
>
As a last resort, we might enable this suboptimal-but-safer behaviour
only when the build system is recognized to be MinGW/MSYS...
... Or we could take advantage of the bash built-in special variable
$SECONDS, if available (that variable was already present in bash 3.0
BTW), and use that to decide whether enough time has elapsed ... WDYT?
Thanks,
Stefano
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/09
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/09
- bug#10470: MSYS: race in directory access?, Stefano Lattarini, 2012/01/10
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/10
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/10
- bug#10470: MSYS: race in directory access?,
Stefano Lattarini <=
- bug#10470: MSYS: race in directory access?, Eric Blake, 2012/01/10
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/10
- bug#10470: MSYS: race in directory access?, Stefano Lattarini, 2012/01/10
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/10
- bug#10470: MSYS: race in directory access?, Stefano Lattarini, 2012/01/10
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/10
- bug#10470: MSYS: race in directory access?, Stefano Lattarini, 2012/01/11
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/11
- bug#10470: MSYS: race in directory access?, Stefano Lattarini, 2012/01/12
- bug#10470: MSYS: race in directory access?, Peter Rosin, 2012/01/12